The HPE Enclosure object has a property named "Model" which will tell you if it is a C7000 or Synergy Frame. We do not collect the version at this time. Both OneView and vROPS have REST APIs so it would be possible to add a metric. I realize that is not an easy solution. What is your use case for needing the Enclosure Version?
Enclosures are parents of HPE Server Hardware objects and Hosts. The HPE OneView Infrastructure dashboard shows this relationship. If you click on a Host or Server Hardware in the Environment Overview the Cluster and the Enclosure will be highlighted. There is not a direct relationship between Enclosures and Clusters as a Cluster can span Enclosures.
Is the oneview pack for vrops worthwhile. Its on my to do list to look out but looking for feedback on others that have configured it. What benefits does it give you?